package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;

import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioProperties properties;

    @Autowired
    private MinioClient minioClient;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

                boolean bucketExists = minioClient.bucketExists(
                        BucketExistsArgs.builder()
                                .bucket(properties.getBucketName())
                                .build());
                if (!bucketExists) {
                minioClient.makeBucket(
                        MakeBucketArgs.builder()
                                .bucket(properties.getBucketName())
                                .build());
                minioClient.setBucketPolicy(
                        SetBucketPolicyArgs.builder()
                                .bucket(properties.getBucketName())
                                .config(createBucketPolicyConfig(properties.getBucketName()))
                                .build());
            }

        String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
                "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        minioClient.putObject(
                PutObjectArgs.builder()
                        .bucket(properties.getBucketName())
                        .stream(file.getInputStream(), file.getSize(), -1)
                        .object(filename)
                        .contentType(file.getContentType())
                        .build());

        return String.join("/",properties.getEndpoint(),properties.getBucketName(),filename);
    }

    private String createBucketPolicyConfig(String bucketName) {
        String policy = "{\n" +
                "                          \"Statement\" : [ {\n" +
                "                            \"Action\" : \"s3:GetObject\",\n" +
                "                            \"Effect\" : \"Allow\",\n" +
                "                            \"Principal\" : \"*\",\n" +
                "                            \"Resource\" : \"arn:aws:s3:::hello-minio/*\"\n" +
                "                          } ],\n" +
                "                          \"Version\" : \"2012-10-17\"\n" +
                "                        }";

        return policy;
    }
}
